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#ifndef __GRPC_INTERNAL_STATISTICS_CENSUS_TRACING_H_
#define __GRPC_INTERNAL_STATISTICS_CENSUS_TRACING_H_

#ifdef __cplusplus
extern "C" {
#endif

/* Opaque structure for trace object */
typedef struct trace_obj trace_obj;

/* Initializes trace store. This function is thread safe. */
void census_tracing_init(void);

/* Shutsdown trace store. This function is thread safe. */
void census_tracing_shutdown(void);

/* Gets trace obj corresponding to the input op_id. Returns NULL if trace store
   is not initialized or trace obj is not found. Requires trace store being
   locked before calling this function. */
trace_obj* census_get_trace_obj_locked(census_op_id op_id);

/* The following two functions acquire and release the trace store global lock.
   They are for census internal use only. */
void census_internal_lock_trace_store(void);
void census_internal_unlock_trace_store(void);

/* Gets method tag name associated with the input trace object. */
const char* census_get_trace_method_name(const trace_obj* trace);

#ifdef __cplusplus
}
#endif

#endif /* __GRPC_INTERNAL_STATISTICS_CENSUS_TRACING_H_ */